# World builder settings. Every [section] below except [planet] and [build] is optional:
# leave a key out to keep its default (README.md → "Tuning" lists them all).

[planet]
radius_km = 6371.0              # Earth 6371. Bigger planet = more cells per continent, slower builds
gravity_g = 1.0                 # surface gravity (Earth = 1)
day_hours = 24.0                # length of a day (sky panel)
year_days = 365.0               # days per year (sky panel, seasons)
tilt_deg = 23.44                # axial tilt: seasons, tropics, polar circles
sea_level_pressure_bar = 1.0
scale_height_km = 8.0           # how fast air thins with height
o2_fraction = 0.21

[build]
seed = 1                        # noise seed: same seed + same config = same world
res_dev = 3                     # H3 resolution for quick builds (3 ≈ 2–3 min, 4 ≈ 5–10 min)
res_final = 4                   # `--final` builds (5 ≈ 30+ min and 16–30 GB RAM)
raster_width = 8192             # equirectangular output width at res_final
dev_raster_width = 2048
preview_width = 2048
land_fraction = 0.29            # share of the surface above sea level (Earth ≈ 0.29)

[climate]
hadley_edge_deg = 30.0          # dry subtropical belt (Earth ≈ 30°)
ferrel_edge_deg = 60.0          # wet westerlies → polar front

[sketch]
warp_km = 800.0                 # how loosely the drawing is followed (0 = exact)